Show/hide sheet grid.
xls_ShowGrid([flag])
grid flag, %t or 1 and %f or 0.
If not specified, used %t.
xls_NewExcel(); xls_AddWorkbook(); xls_SetVisible(); for i = 1 : 3 xls_ShowGrid(); sleep(300); xls_ShowGrid(%f); sleep(300); end xls_SetSave(%t); xls_Close(); xls_Quit();